HD5750 not working OOB. I tried adding id to ati5000 kext. For some reason, I can’t remember what I did back in SL, but I did add id in sl ati5000.kext. I somehow recall something about the x3000 kext. The id for my card is in both places on SL. Someone wanna wake my memory up with what I did. Thanks johnm

Phil: “My Sapphire 5870 Vapor-X works fine in Lion, but only if using DVI ports. My DP-tominiDP adapter that works fine on SL just won’t give any image in Lion.”

Any solution for this problem yet? I have the same problem using latest Netks, Kabyl, and MacMan boot files. The card is recognized properly by Lion – same data displayed during boot in verbose mode in bot SL and Lion. Still in Lion, after finishing boot sequence, the apple disappears from the screen and monitor attached to display port turns black.